1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import java.io.Serializable;
26  
27  import java.util.Comparator;
28  
29  /**
30   * <a href="StringComparator.java.html"><b><i>View Source</i></b></a>
31   *
32   * @author Brian Wing Shun Chan
33   */
34  public class StringComparator implements Comparator<String>, Serializable {
35  
36      public StringComparator() {
37          this(true, false);
38      }
39  
40      public StringComparator(boolean asc, boolean caseSensitive) {
41          _asc = asc;
42          _caseSensitive = caseSensitive;
43      }
44  
45      public int compare(String s1, String s2) {
46          if (s1 == null) {
47              s1 = StringPool.BLANK;
48          }
49  
50          if (s2 == null) {
51              s2 = StringPool.BLANK;
52          }
53  
54          if (!_asc) {
55              String temp = s1;
56  
57              s1 = s2;
58              s2 = temp;
59          }
60  
61          if (_caseSensitive) {
62              return s1.compareTo(s2);
63          }
64          else {
65              return s1.compareToIgnoreCase(s2);
66          }
67      }
68  
69      private boolean _asc;
70      private boolean _caseSensitive;
71  
72  }